Structure characterization and microwave dielectric properties of LiGa5O8 ceramic with low-εr and low loss

Ao, Laiyuan; Tang, Ying; Li, Jie; Fang, Weishuang; Duan, Lian; Su, Congxue; Sun, Yihua; Liu, Laijun; Fang, Liang

doi:10.1016/j.jeurceramsoc.2020.06.017

Cited by 50 publications

(10 citation statements)

References 36 publications

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“…Recently, gallate luminescent materials have garnered much attention due to their excellent chemical and thermal stability. In particular, LiGa 5 O 8 has been widely used to prepare PL and PersL materials [17–20]. LiGa 5 O 8 is a typical cubic system crystal with an inverted spinel structure with the space group of P4 3 32 (No.…”

Section: Resultsmentioning

confidence: 99%

Ratiometric mechanoluminescence in single Pr³⁺‐activated LiGa₅O₈

Xiong

Qing

et al. 2023

Luminescence

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Mechanoluminescence (ML) materials have found potential applications in information storage, anti‐counterfeiting, and stress sensing. Conventional stress sensing based on absolute ML intensity is prone to significant mistakes owing to the unpredictability of measurement surroundings. However, implementing a ratiometric ML sensing technique may considerably ameliorate this issue. In this study, a single activator‐doped gallate material (LiGa5O8:Pr3+) is proposed to determine the relationship between the ML intensity and the change in local positional symmetry that occurs when the material is subjected to stress. The sensing reliability of the ML intensity ratio under different factors (Force; Content; Thickness and Materials) is systematically analyzed, where the factor that has the greatest effect on the proportional ML is the concentration, with the ML intensity asymmetry ratio decreasing from 1.868 to 1.300 varying concentration at constant stress. The colour‐resolved visualization of stress sensing is further realized, which opens a new path for a ratiometric ML‐based strategy to improve the reliability of stress sensing.

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Section: Resultsmentioning

confidence: 99%

Ratiometric mechanoluminescence in single Pr³⁺‐activated LiGa₅O₈

Xiong

Qing

et al. 2023

Luminescence

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“…℃ To obtain new dielectric materials, some researchers pursued materials with the composition containing GeO 2 and Ga 2 O 3 and reported microwave dielectric properties of those materials firstly. With inverse spinel structure, LiGa 5 O 8 was verified as a cubic structure where Li + and Ga 3+ distributed in the octahedral B site with 1:3 ordering [54]. The large deviation between ε r and ε rth in Ba 2 MGa 11 O 20 (M = Bi, La) was ascribed to the "rattling" effect of cations and the existence of lone pair ions of Bi 3+ [55].…”

Section: Ternary Silicate and Germanate Ceramicsmentioning

confidence: 92%

The latest process and challenges of microwave dielectric ceramics based on pseudo phase diagrams

et al. 2021

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The explosive process of 5G communication evokes the urgent demand of miniaturized and integrated dielectric ceramics filter. It is a pressing need to advance the development of dielectric ceramics utilization of emerging technology to design new materials and understand the polarization mechanism. This review provides the summary of the study of microwave dielectric ceramics (MWDCs) sintered higher than 1000 from 2010 up to now, °C with the purpose of taking a broad and historical view of these ceramics and illustrating research directions. To date, researchers endeavor to explain the structure-property relationship of ceramics with multitude of approaches and design a new formula or strategy to obtain excellent microwave dielectric properties. There are variety of factors that impact the permittivity, dielectric loss, and temperature stability of dielectric materials, covering intrinsic and extrinsic factors. Many of these factors are often intertwined, which can complicate new dielectric material discovery and the mechanism investigation. Because of the various ceramics systems, pseudo phase diagram was used to classify the dielectric materials based on the composition. In this review, the ceramics were firstly divided into ternary systems, and then brief description of the experimental probes and complementary theoretical methods that have been used to discern the intrinsic polarization mechanisms and the origin of intrinsic loss was mentioned. Finally, some perspectives on the future outlook for high-temperature MWDCs were offered based on the synthesis method, characterization techniques, and significant theory developments.

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“…38 The proportionality of the imaginary part of dielectric permittivity versus frequency predicted by the damped oscillator model, and consequently such dependence for the loss tangent, is approximately fulfilled in a broad frequency range from the GHz to THz (the microwave to submillimetre wave) region. [38][39][40][41][42] However, for the ceramics under investigation a contribution of the extrinsic losses can occur due to porosity, non-uniform grain size distribution and the presence of small amounts of additional crystalline and amorphous phases.…”

Section: Sem Characterization and Mechanical Propertiesmentioning

confidence: 99%

Novel copper borate ceramics with lithium-based sintering aids for LTCC terahertz applications

et al. 2023

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Structure characterization and microwave dielectric properties of LiGa5O8 ceramic with low-εr and low loss

Cited by 50 publications

References 36 publications

Ratiometric mechanoluminescence in single Pr³⁺‐activated LiGa₅O₈

Ratiometric mechanoluminescence in single Pr³⁺‐activated LiGa₅O₈

The latest process and challenges of microwave dielectric ceramics based on pseudo phase diagrams

Novel copper borate ceramics with lithium-based sintering aids for LTCC terahertz applications

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Structure characterization and microwave dielectric properties of LiGa5O8 ceramic with low-εr and low loss

Cited by 50 publications

References 36 publications

Ratiometric mechanoluminescence in single Pr3+‐activated LiGa5O8

Ratiometric mechanoluminescence in single Pr3+‐activated LiGa5O8

The latest process and challenges of microwave dielectric ceramics based on pseudo phase diagrams

Novel copper borate ceramics with lithium-based sintering aids for LTCC terahertz applications

Contact Info

Product

Resources

About

Ratiometric mechanoluminescence in single Pr³⁺‐activated LiGa₅O₈

Ratiometric mechanoluminescence in single Pr³⁺‐activated LiGa₅O₈